Question : Choosing the right constraint  with the  select query

I have a table that  has ~1.000.000 rows and  it is getting bigger.
The table has a column called IPAdress.

Here is what i want to do:
I will assign 192.168.1.12,192.168.1.13 to User1.
And i will assign 192.168.1.12 to User2 too.

So when User2 runs a query it will only bring the results that have the IpAddress=192.168.1.12
Because User2 is not allowed to see results from other ip addresses.


Now, i am not sure about how to do this fast and accurate.
Please help me to  design a solution.

ps:  Currenly i am doing this:
When  User1  runs a search query in my table, i run
select * from myTable
where IPAddress='192.168.1.12' or   IPAdress='192.168.1.13'
But in practice a User can have  a right to see more than 100 ip addresses  so it means
where IPAddress = will contain   lot of '...' or '...' .....  or strings.
And i am sure this is not the right way to do this.

Thank you .

Answer : Choosing the right constraint  with the  select query

why don't you use IN clause? either with temp table or sub query or make dynamic string